1 #define __SP_PDF_CAIRO_C__
3 /** \file
4 * PDF printing with Cairo.
5 */
6 /*
7 * Authors:
8 * Miklós Erdélyi <erdelyim@gmail.com>
9 *
10 * Based on pdf.cpp
11 *
12 * Licensed under GNU GPL
13 */
15 /* Plain Print */
17 #ifdef HAVE_CONFIG_H
18 # include "config.h"
19 #endif
21 #ifdef HAVE_CAIRO_PDF
23 #ifndef PANGO_ENABLE_BACKEND
24 #define PANGO_ENABLE_BACKEND
25 #endif
27 #ifndef PANGO_ENABLE_ENGINE
28 #define PANGO_ENABLE_ENGINE
29 #endif
32 #include <signal.h>
33 #include <errno.h>
35 #include <libnr/n-art-bpath.h>
37 #include <glib/gmem.h>
38 #include <gtk/gtkstock.h>
39 #include <gtk/gtkvbox.h>
40 #include <gtk/gtkframe.h>
41 #include <gtk/gtkradiobutton.h>
42 #include <gtk/gtkcombo.h>
43 #include <gtk/gtklabel.h>
44 #include <gtk/gtkentry.h>
45 #include <gtk/gtktooltips.h>
47 #include <glibmm/i18n.h>
48 #include "display/nr-arena-item.h"
49 #include "display/canvas-bpath.h"
50 #include "sp-item.h"
51 #include "style.h"
52 #include "sp-linear-gradient.h"
53 #include "sp-radial-gradient.h"
55 #include "libnrtype/font-instance.h"
56 #include "libnrtype/font-style-to-pos.h"
58 #include <unit-constants.h>
60 #include "pdf-cairo.h"
61 #include "extension/system.h"
62 #include "extension/print.h"
64 #include "io/sys.h"
66 #include <cairo.h>
67 #include <cairo-pdf.h>
69 #include <pango/pango.h>
70 #include <pango/pangofc-fontmap.h>
72 #ifdef RENDER_WITH_PANGO_CAIRO
73 #include <pango/pangocairo.h>
74 #else
75 #include <cairo-ft.h>
76 #endif
77 namespace Inkscape {
78 namespace Extension {
79 namespace Internal {
81 static cairo_status_t _write_callback(void *closure, const unsigned char *data, unsigned int length);
82 static void _concat_transform(cairo_t *cr, double xx, double yx, double xy, double yy, double x0, double y0);
84 PrintCairoPDF::PrintCairoPDF() :
85 cr(NULL),
86 pdf_surface(NULL),
87 _layout(NULL),
88 _dpi(72),
89 _bitmap(false)
90 {
91 }
93 PrintCairoPDF::~PrintCairoPDF(void)
94 {
95 if (cr) cairo_destroy(cr);
96 if (pdf_surface) cairo_surface_destroy(pdf_surface);
97 if (_layout) g_object_unref(_layout);
99 /* restore default signal handling for SIGPIPE */
100 #if !defined(_WIN32) && !defined(__WIN32__)
101 (void) signal(SIGPIPE, SIG_DFL);
102 #endif
104 return;
105 }
107 unsigned int
108 PrintCairoPDF::setup(Inkscape::Extension::Print * mod)
109 {
110 static gchar const *const pdr[] = {"72", "75", "100", "144", "150", "200", "300", "360", "600", "1200", "2400", NULL};
112 #ifdef TED
113 Inkscape::XML::Node *repr = ((SPModule *) mod)->repr;
114 #endif
116 unsigned int ret = FALSE;
118 /* Create dialog */
119 GtkTooltips *tt = gtk_tooltips_new();
120 g_object_ref((GObject *) tt);
121 gtk_object_sink((GtkObject *) tt);
123 GtkWidget *dlg = gtk_dialog_new_with_buttons(_("Print Destination"),
124 // SP_DT_WIDGET(SP_ACTIVE_DESKTOP)->window,
125 NULL,
126 (GtkDialogFlags) (GTK_DIALOG_MODAL | GTK_DIALOG_NO_SEPARATOR | GTK_DIALOG_DESTROY_WITH_PARENT),
127 GTK_STOCK_CANCEL,
128 GTK_RESPONSE_CANCEL,
129 GTK_STOCK_PRINT,
130 GTK_RESPONSE_OK,
131 NULL);
133 gtk_dialog_set_default_response(GTK_DIALOG(dlg), GTK_RESPONSE_OK);
135 GtkWidget *vbox = GTK_DIALOG(dlg)->vbox;
136 gtk_container_set_border_width(GTK_CONTAINER(vbox), 4);
137 /* Print properties frame */
138 GtkWidget *f = gtk_frame_new(_("Print properties"));
139 gtk_box_pack_start(GTK_BOX(vbox), f, FALSE, FALSE, 4);
140 GtkWidget *vb = gtk_vbox_new(FALSE, 4);
141 gtk_container_add(GTK_CONTAINER(f), vb);
142 gtk_container_set_border_width(GTK_CONTAINER(vb), 4);
143 /* Print type */
144 bool const p2bm = mod->get_param_bool("bitmap");
145 GtkWidget *rb = gtk_radio_button_new_with_label(NULL, _("Print using PDF operators"));
146 gtk_tooltips_set_tip((GtkTooltips *) tt, rb,
147 _("Use PDF vector operators. The resulting image is usually smaller "
148 "in file size and can be arbitrarily scaled, but "
149 "patterns will be lost."), NULL);
150 if (!p2bm) gtk_toggle_button_set_active((GtkToggleButton *) rb, TRUE);
151 gtk_box_pack_start(GTK_BOX(vb), rb, FALSE, FALSE, 0);
152 rb = gtk_radio_button_new_with_label(gtk_radio_button_get_group((GtkRadioButton *) rb), _("Print as bitmap"));
153 gtk_tooltips_set_tip((GtkTooltips *) tt, rb,
154 _("Print everything as bitmap. The resulting image is usually larger "
155 "in file size and cannot be arbitrarily scaled without quality loss, "
156 "but all objects will be rendered exactly as displayed."), NULL);
157 if (p2bm) gtk_toggle_button_set_active((GtkToggleButton *) rb, TRUE);
158 gtk_box_pack_start(GTK_BOX(vb), rb, FALSE, FALSE, 0);
159 /* Resolution */
160 GtkWidget *hb = gtk_hbox_new(FALSE, 4);
161 gtk_box_pack_start(GTK_BOX(vb), hb, FALSE, FALSE, 0);
162 GtkWidget *combo = gtk_combo_new();
163 gtk_combo_set_value_in_list(GTK_COMBO(combo), FALSE, FALSE);
164 gtk_combo_set_use_arrows(GTK_COMBO(combo), TRUE);
165 gtk_combo_set_use_arrows_always(GTK_COMBO(combo), TRUE);
166 gtk_widget_set_size_request(combo, 64, -1);
167 gtk_tooltips_set_tip((GtkTooltips *) tt, GTK_COMBO(combo)->entry,
168 _("Preferred resolution (dots per inch) of bitmap"), NULL);
169 /* Setup strings */
170 GList *sl = NULL;
171 for (unsigned i = 0; pdr[i] != NULL; i++) {
172 sl = g_list_prepend(sl, (gpointer) pdr[i]);
173 }
174 sl = g_list_reverse(sl);
175 gtk_combo_set_popdown_strings(GTK_COMBO(combo), sl);
176 g_list_free(sl);
177 if (1) {
178 gchar const *val = mod->get_param_string("resolution");
179 gtk_entry_set_text(GTK_ENTRY(GTK_COMBO(combo)->entry), val);
180 }
181 gtk_box_pack_end(GTK_BOX(hb), combo, FALSE, FALSE, 0);
182 GtkWidget *l = gtk_label_new(_("Resolution:"));
183 gtk_box_pack_end(GTK_BOX(hb), l, FALSE, FALSE, 0);
185 /* Print destination frame */
186 f = gtk_frame_new(_("Print destination"));
187 gtk_box_pack_start(GTK_BOX(vbox), f, FALSE, FALSE, 4);
188 vb = gtk_vbox_new(FALSE, 4);
189 gtk_container_add(GTK_CONTAINER(f), vb);
190 gtk_container_set_border_width(GTK_CONTAINER(vb), 4);
192 l = gtk_label_new(_("Printer name (as given by lpstat -p);\n"
193 "leave empty to use the system default printer.\n"
194 "Use '> filename' to print to file.\n"
195 "Use '| prog arg...' to pipe to a program."));
196 gtk_box_pack_start(GTK_BOX(vb), l, FALSE, FALSE, 0);
198 GtkWidget *e = gtk_entry_new();
199 if (1) {
200 gchar const *val = mod->get_param_string("destination");
201 gtk_entry_set_text(GTK_ENTRY(e), ( val != NULL
202 ? val
203 : "" ));
204 }
205 gtk_box_pack_start(GTK_BOX(vb), e, FALSE, FALSE, 0);
207 // pressing enter in the destination field is the same as clicking Print:
208 gtk_entry_set_activates_default(GTK_ENTRY(e), TRUE);
210 gtk_widget_show_all(vbox);
212 int const response = gtk_dialog_run(GTK_DIALOG(dlg));
214 g_object_unref((GObject *) tt);
216 if (response == GTK_RESPONSE_OK) {
217 gchar const *fn;
218 char const *sstr;
220 _bitmap = gtk_toggle_button_get_active((GtkToggleButton *) rb);
221 sstr = gtk_entry_get_text(GTK_ENTRY(GTK_COMBO(combo)->entry));
222 _dpi = (unsigned int) MAX((int)(atof(sstr)), 1);
223 /* Arrgh, have to do something */
224 fn = gtk_entry_get_text(GTK_ENTRY(e));
225 /* skip leading whitespace, bug #1068483 */
226 while (fn && *fn==' ') { fn++; }
227 /* g_print("Printing to %s\n", fn); */
229 mod->set_param_bool("bitmap", _bitmap);
230 mod->set_param_string("resolution", (gchar *)sstr);
231 mod->set_param_string("destination", (gchar *)fn);
232 ret = TRUE;
233 }
235 gtk_widget_destroy(dlg);
237 return ret;
238 }
240 unsigned int
241 PrintCairoPDF::begin(Inkscape::Extension::Print *mod, SPDocument *doc)
242 {
243 FILE *osf = NULL;
244 FILE *osp = NULL;
246 _alpha_stack.clear();
247 _alpha_stack.push_back(1.0);
249 gsize bytesRead = 0;
250 gsize bytesWritten = 0;
251 GError *error = NULL;
252 gchar const *utf8_fn = mod->get_param_string("destination");
253 gchar *local_fn = g_filename_from_utf8( utf8_fn,
254 -1, &bytesRead, &bytesWritten, &error);
255 gchar const *fn = local_fn;
257 /* TODO: Replace the below fprintf's with something that does the right thing whether in
258 * gui or batch mode (e.g. --print=blah). Consider throwing an exception: currently one of
259 * the callers (sp_print_document_to_file, "ret = mod->begin(doc)") wrongly ignores the
260 * return code.
261 */
262 if (fn != NULL) {
263 if (*fn == '|') {
264 fn += 1;
265 while (isspace(*fn)) fn += 1;
266 #ifndef WIN32
267 osp = popen(fn, "w");
268 #else
269 osp = _popen(fn, "w");
270 #endif
271 if (!osp) {
272 fprintf(stderr, "inkscape: popen(%s): %s\n",
273 fn, strerror(errno));
274 return 0;
275 }
276 _stream = osp;
277 } else if (*fn == '>') {
278 fn += 1;
279 while (isspace(*fn)) fn += 1;
280 Inkscape::IO::dump_fopen_call(fn, "K");
281 osf = Inkscape::IO::fopen_utf8name(fn, "w+");
282 if (!osf) {
283 fprintf(stderr, "inkscape: fopen(%s): %s\n",
284 fn, strerror(errno));
285 return 0;
286 }
287 _stream = osf;
288 } else {
289 /* put cwd stuff in here */
290 gchar *qn = ( *fn
291 ? g_strdup_printf("lpr -P %s", fn) /* FIXME: quote fn */
292 : g_strdup("lpr") );
293 #ifndef WIN32
294 osp = popen(qn, "w");
295 #else
296 osp = _popen(qn, "w");
297 #endif
298 if (!osp) {
299 fprintf(stderr, "inkscape: popen(%s): %s\n",
300 qn, strerror(errno));
301 return 0;
302 }
303 g_free(qn);
304 _stream = osp;
305 }
306 }
308 g_free(local_fn);
310 if (_stream) {
311 /* fixme: this is kinda icky */
312 #if !defined(_WIN32) && !defined(__WIN32__)
313 (void) signal(SIGPIPE, SIG_IGN);
314 #endif
315 }
317 // test output stream?
319 // width and height in pt
320 _width = sp_document_width(doc) * PT_PER_PX;
321 _height = sp_document_height(doc) * PT_PER_PX;
323 NRRect d;
324 bool pageBoundingBox;
325 pageBoundingBox = mod->get_param_bool("pageBoundingBox");
326 // printf("Page Bounding Box: %s\n", pageBoundingBox ? "TRUE" : "FALSE");
327 if (pageBoundingBox) {
328 d.x0 = d.y0 = 0;
329 d.x1 = _width;
330 d.y1 = _height;
331 } else {
332 // if not page, use our base, which is either root or the item we want to export
333 SPItem* doc_item = SP_ITEM(mod->base);
334 sp_item_invoke_bbox(doc_item, &d, sp_item_i2root_affine(doc_item), TRUE);
335 // convert from px to pt
336 d.x0 *= PT_PER_PX;
337 d.x1 *= PT_PER_PX;
338 d.y0 *= PT_PER_PX;
339 d.y1 *= PT_PER_PX;
340 }
341 // printf("\n _width:%f _height:%f scale:%f\n", _width, _height, PT_PER_PX);
342 pdf_surface = cairo_pdf_surface_create_for_stream(Inkscape::Extension::Internal::_write_callback, _stream, d.x1-d.x0, d.y1-d.y0);
343 cr = cairo_create(pdf_surface);
344 // move to the origin
345 cairo_translate (cr, -d.x0, -d.y0);
347 if (!_bitmap) {
348 cairo_scale(cr, PT_PER_PX, PT_PER_PX);
350 // from now on we can output px, but they will be treated as pt
351 // note that the we do not have to flip the y axis
352 // because Cairo's coordinate system is identical to Inkscape's
353 }
355 return 1;
356 }
358 unsigned int
359 PrintCairoPDF::finish(Inkscape::Extension::Print *mod)
360 {
361 if (!_stream) return 0;
362 if (_bitmap) return 0;
364 cairo_show_page(cr);
366 cairo_destroy(cr);
367 cairo_surface_destroy(pdf_surface);
368 cr = NULL;
369 pdf_surface = NULL;
371 /* Flush stream to be sure. */
372 (void) fflush(_stream);
374 /* fixme: should really use pclose for popen'd streams */
375 fclose(_stream);
376 _stream = 0;
378 return 1;
379 }
381 unsigned int
382 PrintCairoPDF::bind(Inkscape::Extension::Print *mod, NR::Matrix const *transform, float opacity)
383 {
384 if (!_stream) return 0; // XXX: fixme, returning -1 as unsigned.
385 if (_bitmap) return 0;
387 if (opacity < 1.0) {
388 cairo_push_group(cr);
389 } else {
390 cairo_save(cr);
391 }
392 _concat_transform(cr, (*transform)[0], (*transform)[1], (*transform)[2], (*transform)[3], (*transform)[4], (*transform)[5]);
393 // printf("bind: (%f) %f %f %f %f %f %f\n", opacity, transform->c[0], transform->c[1], transform->c[2], transform->c[3], transform->c[4], transform->c[5]);
394 // remember these to be able to undo them when outputting text
395 _last_tx = (*transform)[4];
396 _last_ty = (*transform)[5];
398 _alpha_stack.push_back(opacity);
400 return 1;
401 }
403 unsigned int
404 PrintCairoPDF::release(Inkscape::Extension::Print *mod)
405 {
406 if (!_stream) return 0; // XXX: fixme, returning -1 as unsigned.
407 if (_bitmap) return 0;
409 float opacity = _alpha_stack.back();
411 if (opacity < 1.0) {
412 cairo_pop_group_to_source(cr);
413 cairo_paint_with_alpha(cr, opacity);
414 } else {
415 cairo_restore(cr);
416 }
417 // g_printf("release\n");
418 _alpha_stack.pop_back();
419 g_assert(_alpha_stack.size() > 0);
421 return 1;
422 }
424 unsigned int
425 PrintCairoPDF::comment(Inkscape::Extension::Print *mod, char const *comment)
426 {
427 if (!_stream) return 0; // XXX: fixme, returning -1 as unsigned.
428 if (_bitmap) return 0;
430 return 1;
431 }
433 cairo_pattern_t*
434 PrintCairoPDF::create_pattern_for_paint(SPPaintServer const *const paintserver, NRRect const *pbox, float alpha)
435 {
436 cairo_pattern_t *pattern = NULL;
437 bool apply_bbox2user = false;
439 if (SP_IS_LINEARGRADIENT (paintserver)) {
441 SPLinearGradient *lg=SP_LINEARGRADIENT(paintserver);
443 sp_gradient_ensure_vector(SP_GRADIENT(lg)); // when exporting from commandline, vector is not built
445 NR::Point p1 (lg->x1.computed, lg->y1.computed);
446 NR::Point p2 (lg->x2.computed, lg->y2.computed);
447 if (pbox && SP_GRADIENT(lg)->units == SP_GRADIENT_UNITS_OBJECTBOUNDINGBOX) {
448 // convert to userspace
449 NR::Matrix bbox2user(pbox->x1 - pbox->x0, 0, 0, pbox->y1 - pbox->y0, pbox->x0, pbox->y0);
450 p1 *= bbox2user;
451 p2 *= bbox2user;
452 }
454 // create linear gradient pattern
455 pattern = cairo_pattern_create_linear(p1[NR::X], p1[NR::Y], p2[NR::X], p2[NR::Y]);
457 // add stops
458 for (gint i = 0; unsigned(i) < lg->vector.stops.size(); i++) {
459 float rgb[3];
460 sp_color_get_rgb_floatv(&lg->vector.stops[i].color, rgb);
461 cairo_pattern_add_color_stop_rgba(pattern, lg->vector.stops[i].offset, rgb[0], rgb[1], rgb[2], lg->vector.stops[i].opacity * alpha);
462 }
463 } else if (SP_IS_RADIALGRADIENT (paintserver)) {
465 SPRadialGradient *rg=SP_RADIALGRADIENT(paintserver);
467 sp_gradient_ensure_vector(SP_GRADIENT(rg)); // when exporting from commandline, vector is not built
469 NR::Point c (rg->cx.computed, rg->cy.computed);
470 NR::Point f (rg->fx.computed, rg->fy.computed);
471 double r = rg->r.computed;
473 NR::Coord const df = hypot(f[NR::X] - c[NR::X], f[NR::Y] - c[NR::Y]);
474 if (df >= r) {
475 f[NR::X] = c[NR::X] + (f[NR::X] - c[NR::X] ) * r / (float) df;
476 f[NR::Y] = c[NR::Y] + (f[NR::Y] - c[NR::Y] ) * r / (float) df;
477 }
479 if (pbox && SP_GRADIENT(rg)->units == SP_GRADIENT_UNITS_OBJECTBOUNDINGBOX)
480 apply_bbox2user = true;
482 // create radial gradient pattern
483 pattern = cairo_pattern_create_radial(f[NR::X], f[NR::Y], 0, c[NR::X], c[NR::Y], r);
485 // add stops
486 for (gint i = 0; unsigned(i) < rg->vector.stops.size(); i++) {
487 float rgb[3];
488 sp_color_get_rgb_floatv(&rg->vector.stops[i].color, rgb);
489 cairo_pattern_add_color_stop_rgba(pattern, rg->vector.stops[i].offset, rgb[0], rgb[1], rgb[2], rg->vector.stops[i].opacity * alpha);
490 }
491 }
493 if (pattern) {
494 SPGradient *g = SP_GRADIENT(paintserver);
496 // set extend type
497 SPGradientSpread spread = sp_gradient_get_spread(g);
498 switch (spread) {
499 case SP_GRADIENT_SPREAD_REPEAT:
500 cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT);
501 break;
502 case SP_GRADIENT_SPREAD_REFLECT:
503 cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REFLECT);
504 break;
505 case SP_GRADIENT_SPREAD_PAD:
506 default:
507 cairo_pattern_set_extend(pattern, CAIRO_EXTEND_PAD);
508 break;
509 }
511 cairo_matrix_t pattern_matrix;
512 if (g->gradientTransform_set) {
513 // apply gradient transformation
514 cairo_matrix_init(&pattern_matrix,
515 g->gradientTransform[0], g->gradientTransform[1],
516 g->gradientTransform[2], g->gradientTransform[3],
517 g->gradientTransform[4], g->gradientTransform[5]);
518 } else {
519 cairo_matrix_init_identity (&pattern_matrix);
520 }
522 if (apply_bbox2user) {
523 // convert to userspace
524 cairo_matrix_t bbox2user;
525 cairo_matrix_init (&bbox2user, pbox->x1 - pbox->x0, 0, 0, pbox->y1 - pbox->y0, pbox->x0, pbox->y0);
526 cairo_matrix_multiply (&pattern_matrix, &bbox2user, &pattern_matrix);
527 }
528 cairo_matrix_invert(&pattern_matrix); // because Cairo expects a userspace->patternspace matrix
529 cairo_pattern_set_matrix(pattern, &pattern_matrix);
530 }
532 return pattern;
533 }
535 void
536 PrintCairoPDF::print_fill_style(cairo_t *cr, SPStyle const *const style, NRRect const *pbox)
537 {
538 g_return_if_fail( style->fill.isColor()
539 || ( style->fill.isPaintserver()
540 && SP_IS_GRADIENT(SP_STYLE_FILL_SERVER(style)) ) );
542 if (style->fill.isColor()) {
543 float rgb[3];
544 sp_color_get_rgb_floatv(&style->fill.value.color, rgb);
546 float alpha = SP_SCALE24_TO_FLOAT(style->fill_opacity.value);
548 cairo_set_source_rgba(cr, rgb[0], rgb[1], rgb[2], alpha);
549 } else {
550 g_assert( style->fill.isPaintserver()
551 && SP_IS_GRADIENT(SP_STYLE_FILL_SERVER(style)) );
553 cairo_pattern_t *pattern = create_pattern_for_paint(SP_STYLE_FILL_SERVER(style), pbox, 1.0);
555 if (pattern) {
556 cairo_set_source(cr, pattern);
557 cairo_pattern_destroy(pattern);
558 }
559 }
560 }
562 unsigned int
563 PrintCairoPDF::fill(Inkscape::Extension::Print *mod, NRBPath const *bpath, NR::Matrix const *ctm, SPStyle const *const style,
564 NRRect const *pbox, NRRect const *dbox, NRRect const *bbox)
565 {
566 if (!_stream) return 0; // XXX: fixme, returning -1 as unsigned.
567 if (_bitmap) return 0;
569 if ( style->fill.isColor()
570 || ( style->fill.isPaintserver()
571 && SP_IS_GRADIENT(SP_STYLE_FILL_SERVER(style)) ) ) {
573 float alpha = SP_SCALE24_TO_FLOAT(style->fill_opacity.value);
575 cairo_save(cr);
577 print_fill_style(cr, style, pbox);
578 print_bpath(cr, bpath->path);
579 if (style->fill_rule.computed == SP_WIND_RULE_EVENODD) {
580 cairo_set_fill_rule(cr, CAIRO_FILL_RULE_EVEN_ODD);
581 } else {
582 cairo_set_fill_rule(cr, CAIRO_FILL_RULE_WINDING);
583 }
584 if (alpha != 1.0 &&
585 !style->fill.isColor()) {
587 cairo_clip (cr);
588 cairo_paint_with_alpha (cr, alpha);
589 } else {
590 cairo_fill(cr);
591 }
593 cairo_restore(cr);
594 }
596 return 0;
597 }
599 void
600 PrintCairoPDF::print_stroke_style(cairo_t *cr, SPStyle const *style, NRRect const *pbox)
601 {
602 float alpha = SP_SCALE24_TO_FLOAT(style->stroke_opacity.value);
604 if ( style->stroke.isColor() ) {
605 float rgb[3];
606 sp_color_get_rgb_floatv(&style->stroke.value.color, rgb);
608 cairo_set_source_rgba(cr, rgb[0], rgb[1], rgb[2], alpha);
609 } else if ( style->stroke.isPaintserver()
610 && SP_IS_GRADIENT(SP_STYLE_STROKE_SERVER(style)) ) {
612 cairo_pattern_t *pattern = create_pattern_for_paint(SP_STYLE_STROKE_SERVER(style), pbox, alpha);
614 if (pattern) {
615 cairo_set_source(cr, pattern);
616 cairo_pattern_destroy(pattern);
617 }
618 }
620 if (style->stroke_dash.n_dash &&
621 style->stroke_dash.dash )
622 {
623 cairo_set_dash(cr, style->stroke_dash.dash, style->stroke_dash.n_dash, style->stroke_dash.offset);
624 } else {
625 cairo_set_dash(cr, NULL, 0, 0.0); // disable dashing
626 }
628 cairo_set_line_width(cr, style->stroke_width.computed);
630 // set line join type
631 cairo_line_join_t join = CAIRO_LINE_JOIN_MITER;
632 switch (style->stroke_linejoin.computed) {
633 case SP_STROKE_LINEJOIN_MITER:
634 join = CAIRO_LINE_JOIN_MITER;
635 break;
636 case SP_STROKE_LINEJOIN_ROUND:
637 join = CAIRO_LINE_JOIN_ROUND;
638 break;
639 case SP_STROKE_LINEJOIN_BEVEL:
640 join = CAIRO_LINE_JOIN_BEVEL;
641 break;
642 }
643 cairo_set_line_join(cr, join);
645 // set line cap type
646 cairo_line_cap_t cap = CAIRO_LINE_CAP_BUTT;
647 switch (style->stroke_linecap.computed) {
648 case SP_STROKE_LINECAP_BUTT:
649 cap = CAIRO_LINE_CAP_BUTT;
650 break;
651 case SP_STROKE_LINECAP_ROUND:
652 cap = CAIRO_LINE_CAP_ROUND;
653 break;
654 case SP_STROKE_LINECAP_SQUARE:
655 cap = CAIRO_LINE_CAP_SQUARE;
656 break;
657 }
658 cairo_set_line_cap(cr, cap);
659 cairo_set_miter_limit(cr, MAX(1, style->stroke_miterlimit.value));
660 }
662 unsigned int
663 PrintCairoPDF::stroke(Inkscape::Extension::Print *mod, NRBPath const *bpath, NR::Matrix const *ctm, SPStyle const *style,
664 NRRect const *pbox, NRRect const *dbox, NRRect const *bbox)
665 {
666 if (!_stream) return 0; // XXX: fixme, returning -1 as unsigned.
667 if (_bitmap) return 0;
669 if ( style->stroke.isColor() ||
670 ( style->stroke.isPaintserver()
671 && SP_IS_GRADIENT(SP_STYLE_STROKE_SERVER(style)) ) ) {
673 cairo_save(cr);
675 print_stroke_style(cr, style, pbox);
676 print_bpath(cr, bpath->path);
677 cairo_stroke(cr);
679 cairo_restore(cr);
680 }
682 return 0;
683 }
685 unsigned int
686 PrintCairoPDF::image(Inkscape::Extension::Print *mod, guchar *px, unsigned int w, unsigned int h, unsigned int rs,
687 NR::Matrix const *transform, SPStyle const *style)
688 {
689 if (!_stream) return 0; // XXX: fixme, returning -1 as unsigned.
690 if (_bitmap) return 0;
692 guchar* px_rgba = (guchar*)g_malloc(4 * w * h);
693 if (!px_rgba) return 0;
695 float alpha = _alpha_stack.back();
697 // make a copy of the original pixbuf with premultiplied alpha
698 // if we pass the original pixbuf it will get messed up
699 for (unsigned i = 0; i < h; i++) {
700 for (unsigned j = 0; j < w; j++) {
701 guchar const *src = px + i * rs + j * 4;
702 guint32 *dst = (guint32 *)(px_rgba + i * rs + j * 4);
703 guchar r, g, b, alpha_dst;
705 // calculate opacity-modified alpha
706 alpha_dst = src[3];
707 if (alpha != 1.0)
708 alpha_dst = (guchar)ceil((float)alpha_dst * alpha);
710 // premul alpha (needed because this will be undone by cairo-pdf)
711 r = src[0]*alpha_dst/255;
712 g = src[1]*alpha_dst/255;
713 b = src[2]*alpha_dst/255;
715 *dst = (((alpha_dst) << 24) | (((r)) << 16) | (((g)) << 8) | (b));
716 }
717 }
719 cairo_surface_t *image_surface = cairo_image_surface_create_for_data(px_rgba, CAIRO_FORMAT_ARGB32, w, h, w * 4);
720 if (cairo_surface_status(image_surface)) {
721 g_printf("Error: %s\n", cairo_status_to_string(cairo_surface_status(image_surface)));
722 return 0;
723 }
725 cairo_save(cr);
727 // scaling by width & height is not needed because it will be done by cairo-pdf
728 // we have to translate down by height also in order to eliminate the last translation done by sp_image_print
729 cairo_matrix_t matrix;
730 cairo_matrix_init(&matrix,
731 (*transform)[0]/w, (*transform)[1],
732 (*transform)[2], -(*transform)[3]/h,
733 (*transform)[4], (*transform)[5] + (*transform)[3]);
734 cairo_transform(cr, &matrix);
736 cairo_pattern_t *pattern = cairo_pattern_create_for_surface(image_surface);
737 cairo_pattern_set_extend(pattern, CAIRO_EXTEND_NONE);
739 cairo_set_source(cr, pattern);
740 cairo_pattern_destroy(pattern);
742 // set clip region so that the pattern will not be repeated (bug in Cairo prior 1.2.1)
743 cairo_new_path(cr);
744 cairo_rectangle(cr, 0, 0, w, h);
745 cairo_clip(cr);
747 cairo_paint(cr);
749 cairo_restore(cr);
751 cairo_surface_destroy(image_surface);
752 g_free(px_rgba);
754 return 0;
755 }
757 #define GLYPH_ARRAY_SIZE 64
759 #ifndef RENDER_WITH_PANGO_CAIRO
761 NR::Point
762 PrintCairoPDF::draw_glyphs(cairo_t *cr, NR::Point p, PangoFont *font, PangoGlyphString *glyph_string,
763 bool vertical, bool stroke)
764 {
765 cairo_glyph_t glyph_array[GLYPH_ARRAY_SIZE];
766 cairo_glyph_t *glyphs = glyph_array;
767 if (glyph_string->num_glyphs > GLYPH_ARRAY_SIZE)
768 glyphs = (cairo_glyph_t*)g_malloc(sizeof(cairo_glyph_t) * glyph_string->num_glyphs);
770 PangoGlyphUnit x_offset = 0, y_offset = 0;
771 PangoGlyphInfo *info;
772 int num_invalid_glyphs = 0;
773 for (gint i = 0; i < glyph_string->num_glyphs; i++) {
774 info = &glyph_string->glyphs[i];
775 // skip glyphs which are PANGO_GLYPH_EMPTY (0x0FFFFFFF) or have
776 // the PANGO_GLYPH_UNKNOWN_FLAG (0x10000000) set
777 if (info->glyph == 0x0FFFFFFF || info->glyph & 0x10000000) {
778 num_invalid_glyphs++;
779 continue;
780 }
782 glyphs[i - num_invalid_glyphs].index = info->glyph;
783 glyphs[i - num_invalid_glyphs].x = p[NR::X] + (x_offset + info->geometry.x_offset)/PANGO_SCALE;
784 glyphs[i - num_invalid_glyphs].y = p[NR::Y] + (y_offset + info->geometry.y_offset)/PANGO_SCALE;
786 if (vertical) {
787 cairo_text_extents_t extents;
788 cairo_glyph_extents(cr, &glyphs[i - num_invalid_glyphs], 1, &extents);
789 y_offset += (PangoGlyphUnit)(extents.y_advance * PANGO_SCALE);
790 }
791 else
792 x_offset += info->geometry.width;
793 }
795 if (stroke)
796 cairo_glyph_path(cr, glyphs, glyph_string->num_glyphs - num_invalid_glyphs);
797 else
798 cairo_show_glyphs(cr, glyphs, glyph_string->num_glyphs - num_invalid_glyphs);
800 if (glyph_string->num_glyphs > GLYPH_ARRAY_SIZE)
801 g_free(glyphs);
803 return NR::Point(x_offset, y_offset);
804 }
805 #endif
809 unsigned int
810 PrintCairoPDF::text(Inkscape::Extension::Print *mod, char const *text, NR::Point p,
811 SPStyle const *const style)
812 {
813 bool dirty_pattern = false;
815 if (!_stream) return 0; // XXX: fixme, returning -1 as unsigned.
816 if (_bitmap) return 0;
818 cairo_save(cr);
820 // this needs to be there to encounter Cairo's userspace locking semantics for set_source
821 // otherwise gradients won't be shown correctly
822 // printf("\n _last_tx:%f _last_ty:%f", _last_tx, _last_ty);
823 cairo_translate(cr, -_last_tx, -_last_ty);
825 // create pango layout and context if needed
826 if (_layout == NULL) {
827 #ifdef RENDER_WITH_PANGO_CAIRO
828 //_context = pango_cairo_font_map_create_context(PANGO_CAIRO_FONT_MAP(pango_cairo_font_map_get_default()));
829 _layout = pango_cairo_create_layout(cr);
830 #else
831 _layout = pango_layout_new((font_factory::Default())->fontContext);
832 #endif
833 }
835 // create font instance from style and use it
836 font_instance *tf = font_factory::Default()->FaceFromStyle(style);
837 if (tf == NULL) { // do something
838 g_printf("Warning: trouble getting font_instance\n");
839 tf = (font_factory::Default())->Face("sans", font_style_to_pos(*style));
840 }
841 PangoFontDescription *adjusted = pango_font_description_copy(tf->descr);
843 pango_font_description_set_absolute_size(adjusted, (gint)(style->font_size.computed * PANGO_SCALE));
844 pango_layout_set_font_description(_layout, adjusted);
845 pango_layout_set_text(_layout, text, -1);
847 pango_font_description_free(adjusted);
848 tf->Unref();
850 #ifdef RENDER_WITH_PANGO_CAIRO
851 pango_cairo_update_layout(cr, _layout);
852 #else
853 pango_layout_context_changed(_layout); // is this needed?
854 #endif
856 PangoLayoutLine *line = pango_layout_get_line(_layout, 0);
857 if (line == NULL)
858 return 0;
860 #ifndef RENDER_WITH_PANGO_CAIRO
861 // apply the selected font
862 double size;
863 PangoLayoutRun *first_run = (PangoLayoutRun *)line->runs->data;
864 PangoFcFont *fc_font = PANGO_FC_FONT(first_run->item->analysis.font);
865 FcPattern *fc_pattern = fc_font->font_pattern;
867 if ( style->writing_mode.set &&
868 (style->writing_mode.computed == SP_CSS_WRITING_MODE_TB_RL ||
869 style->writing_mode.computed == SP_CSS_WRITING_MODE_TB_LR) )
870 {
871 FcPatternDel(fc_pattern, FC_VERTICAL_LAYOUT);
872 FcPatternAddBool(fc_pattern, FC_VERTICAL_LAYOUT, FcTrue);
873 dirty_pattern = true;
874 }
876 cairo_font_face_t *font_face = cairo_ft_font_face_create_for_pattern(fc_pattern);
877 cairo_set_font_face(cr, font_face);
879 if (FcPatternGetDouble(fc_pattern, FC_PIXEL_SIZE, 0, &size) != FcResultMatch)
880 size = 12.0;
882 // adjust size and horizontal flip
883 cairo_matrix_t matrix;
884 cairo_get_font_matrix(cr, &matrix);
885 matrix.xx = size;
886 matrix.yy = -matrix.xx;
887 cairo_set_font_matrix(cr, &matrix);
888 #endif
890 if ( style->fill.isColor()
891 || ( style->fill.isPaintserver()
892 && SP_IS_GRADIENT(SP_STYLE_FILL_SERVER(style)) ) )
893 {
894 // set fill style
895 print_fill_style(cr, style, NULL);
897 #ifndef RENDER_WITH_PANGO_CAIRO
898 NR::Point cursor(_last_tx, _last_ty);
899 for (GSList *tmpList = line->runs; tmpList && tmpList->data; tmpList = tmpList->next) {
900 PangoLayoutRun *run = (PangoLayoutRun *)tmpList->data;
901 cursor += draw_glyphs(cr, cursor, run->item->analysis.font, run->glyphs, dirty_pattern, false) / PANGO_SCALE;
902 }
903 #else
904 cairo_new_path(cr);
905 // as pango has inverted origin we simulate the moveto and apply the vertical flip
906 //cairo_move_to(cr, _last_tx, _last_ty);
907 cairo_translate(cr, _last_tx, _last_ty);
908 cairo_scale(cr, 1, -1);
909 cairo_move_to(cr, 0, 0);
910 pango_cairo_show_layout_line(cr, line);
911 cairo_scale(cr, 1, -1);
912 cairo_translate(cr, -_last_tx, -_last_ty);
914 #endif
915 }
917 if (style->stroke.isColor()
918 || ( style->stroke.isPaintserver()
919 && SP_IS_GRADIENT(SP_STYLE_STROKE_SERVER(style)) ) )
920 {
921 // set stroke style
922 print_stroke_style(cr, style, NULL);
924 // paint stroke
925 #ifndef RENDER_WITH_PANGO_CAIRO
926 NR::Point cursor(_last_tx, _last_ty);
927 for (GSList *tmpList = line->runs; tmpList && tmpList->data; tmpList = tmpList->next) {
928 PangoLayoutRun *run = (PangoLayoutRun *)tmpList->data;
929 cursor += draw_glyphs(cr, cursor, run->item->analysis.font, run->glyphs, dirty_pattern, true) / PANGO_SCALE;
930 }
931 #else
932 cairo_new_path(cr);
933 // as pango has inverted origin we simulate the moveto and apply the vertical flip
934 //cairo_move_to(cr, _last_tx, _last_ty);
935 cairo_translate(cr, _last_tx, _last_ty);
936 cairo_scale(cr, 1, -1);
937 cairo_move_to(cr, 0, 0);
938 pango_cairo_layout_line_path(cr, line);
939 cairo_scale(cr, 1, -1);
940 cairo_translate(cr, -_last_tx, -_last_ty);
941 #endif
942 cairo_stroke(cr);
943 }
946 cairo_restore(cr);
948 #ifndef RENDER_WITH_PANGO_CAIRO
949 cairo_font_face_destroy(font_face);
951 if (dirty_pattern) {
952 FcPatternDel(fc_pattern, FC_VERTICAL_LAYOUT);
953 FcPatternAddBool(fc_pattern, FC_VERTICAL_LAYOUT, FcFalse);
954 }
955 #endif
957 return 0;
958 }
960 /* Helper functions */
962 void
963 PrintCairoPDF::print_bpath(cairo_t *cr, NArtBpath const *bp)
964 {
965 cairo_new_path(cr);
966 bool closed = false;
967 while (bp->code != NR_END) {
968 switch (bp->code) {
969 case NR_MOVETO:
970 if (closed) {
971 cairo_close_path(cr);
972 }
973 closed = true;
974 cairo_move_to(cr, bp->x3, bp->y3);
975 break;
976 case NR_MOVETO_OPEN:
977 if (closed) {
978 cairo_close_path(cr);
979 }
980 closed = false;
981 cairo_move_to(cr, bp->x3, bp->y3);
982 break;
983 case NR_LINETO:
984 cairo_line_to(cr, bp->x3, bp->y3);
985 break;
986 case NR_CURVETO:
987 cairo_curve_to(cr, bp->x1, bp->y1, bp->x2, bp->y2, bp->x3, bp->y3);
988 break;
989 default:
990 break;
991 }
992 bp += 1;
993 }
994 if (closed) {
995 cairo_close_path(cr);
996 }
997 }
999 static void
1000 _concat_transform(cairo_t *cr, double xx, double yx, double xy, double yy, double x0, double y0)
1001 {
1002 cairo_matrix_t matrix;
1004 cairo_matrix_init(&matrix, xx, yx, xy, yy, x0, y0);
1005 cairo_transform(cr, &matrix);
1006 }
1008 static cairo_status_t
1009 _write_callback(void *closure, const unsigned char *data, unsigned int length)
1010 {
1011 size_t written;
1012 FILE *file = (FILE*)closure;
1014 written = fwrite (data, 1, length, file);
1016 if (written == length)
1017 return CAIRO_STATUS_SUCCESS;
1018 else
1019 return CAIRO_STATUS_WRITE_ERROR;
1020 }
1022 bool
1023 PrintCairoPDF::textToPath(Inkscape::Extension::Print * ext)
1024 {
1025 return ext->get_param_bool("textToPath");
1026 }
1028 #include "clear-n_.h"
1030 void
1031 PrintCairoPDF::init(void)
1032 {
1033 /* PDF out */
1034 (void) Inkscape::Extension::build_from_mem(
1035 "<inkscape-extension>\n"
1036 "<name>" N_("PDF Print") "</name>\n"
1037 "<id>" SP_MODULE_KEY_PRINT_CAIRO_PDF "</id>\n"
1038 "<param name=\"bitmap\" type=\"boolean\">FALSE</param>\n"
1039 "<param name=\"resolution\" type=\"string\">72</param>\n"
1040 "<param name=\"destination\" type=\"string\">| lp</param>\n"
1041 "<param name=\"pageBoundingBox\" type=\"boolean\">TRUE</param>\n"
1042 "<param name=\"textToPath\" type=\"boolean\">TRUE</param>\n"
1043 "<param name=\"exportDrawing\" type=\"boolean\">FALSE</param>\n"
1044 "<param name=\"exportId\" type=\"string\"></param>\n"
1045 "<print/>\n"
1046 "</inkscape-extension>", new PrintCairoPDF());
1047 }
1050 } /* namespace Internal */
1051 } /* namespace Extension */
1052 } /* namespace Inkscape */
1054 /* End of GNU GPL code */
1056 #endif /* HAVE_CAIRO_PDF */
1059 /*
1060 Local Variables:
1061 mode:c++
1062 c-file-style:"stroustrup"
1063 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
1064 indent-tabs-mode:nil
1065 fill-column:99
1066 End:
1067 */
1068 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :